Heureka (I have found it)
Below works, it’s been tested twice in FS2020
Found a way which works, you can keep the over stressing settings on HARD, as I’ve always had.
spawn to runway
take your little Bonanza back to the parking
turn everything OFF
start as you would cold & dark, in this case slightly warm & dark
takeoff works fine, without crashing !
So the question is (for the Developers to work out) what’s the difference between spawning to the runway…and starting cold & dark ?
I’ll leave it here, I can live with extra extra step, no problem.
Cheers,
Ronnie